.nav {
    height: 41px;
    line-height: 41px;
    border-top: 5px solid #FF8500;
    border-bottom: 1px solid #EDEEF0;
    background-color: #FCFCFC;
}

.nav a {
    /* 转换为行内块元素 */
    display: inline-block;
    font-size: 12px;
    color: #4C4C4C;
    /* 取消下划线 */
    text-decoration: none;
    height: 40px;
    padding: 0 20px;
}

/* 鼠标经过时 */
.nav a:hover {
    background-color: #EDEEF0;
    color: #FD8E16;
}